<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div style="height: 100px;border: 1px solid yellow;">
        <ol style="list-style-type: none;">
            <li>
                <img src="3.png" width="50" height="50">
            </li>
            <li>
                <a href="">我的</a>
            </li>
            <li>
                主页
            </li>
        </ol>
    </div>
    <div style="height: 300px;">
        <div style="float: left;height: 100%;width: 20%;border: 1px solid yellow;">
            aside
        </div>
        <div style="float: right;height: 100%;width: 79%;">
            section
        </div>
    </div>
    <div style="height: 100ps;border: 1px solid yellow;">
        footer
    </div>
    <div style="position:fixed;top:0px;right:0px;width: 100px;height: 100px;background-color: aqua;">

    </div>
</body>
<style>
    div{
        background-color: pink;
    }
    li{
        float:left;
        size: 100px;
        background-color: gray;
    }
</style>
</html>